Mechanism for vibrating diaphragms of pulp screens



M. F. HAYES Sept. 13,1949.

MECHANISM FOR VIBRATING DIAFHRAGMS OF PULP SCREENS 3 Sheets-Sheet 1Filed April 7, 1945 I 9 I JNVENTOR. Mdfifl M. F. HAYES Sept. 13, 1949.

MECHANISM FOR VIBRATING DIAPHRAGMS OF PULP SCREENS 3 Shets-Sheet 2 FiledApril 7, 1945 INVENTOR. Md

Sept. 13, 1949.

Filed April 7, 1945 M. F. HAYES MECHANISM FOR VIBRATING DIAPHRAGMS OFPULP SCREENS 3 Sheets-Sheet 3 'INVENTOR.

BY we? Patented Sept. 13, 1949 MECHANISM FOR VIBRATING DIAPHRAGMS OFPULP SCREENS Millard F. Hayes, Hudson Falls, N. Y., assignor to TheSandy Hill Iron & Brass Works, Hudson Falls, N. Y., a corporation of NewYork Application April 7, 1945, Serial No. 587,133

1 Claim. 1

This invention relates to improvements in paper pulp screens and isdirected more particularly to improvements in operating means therefor.

Apparatus of the type to which the invention relates is shown anddescribed in U. S. Patents No. 1,578,590 of March 30, 1926, and No.1,923,479 of August 22, 1933.

The principal objects of the invention are directed to the provision ofoperating mechanism for a paper pulp screen apparatus which is strongand rigid in construction and easily and readily assembled anddisassembled and at the same time novel means is provided to facilitatelubrication.

According to special features of the invention, the constructionincludes half-housings which form a chamber in which a cross-head isreciprocable up and down and is characterized by means to seal saidchamber that is arranged to permit sliding movements of the cross-headand diaphragm member associated therewith.

With the foregoing and various other novel features and advantages andother objects of my invention as will become more apparent as thedescription proceeds, the invention consists in certain novel featuresof construction and in the combination and arrangement of parts as willbe hereinafter more particularly pointed out in the claim hereuntoannexed and more fully described and referred to in connection with theaccompanying drawings wherein:

Fig. 1 is a side elevational View of operating mechanism embodying thenovel features of the invention;

Fig. 2 is a front elevational view of the mechanism shown in Fig. l; and

Figs. 3 and 4 are sectional plan views on the lines 3-3 and 4-4respectively of Fig. 1.

Referring now to the drawings more in detail the invention will be fullydescribed.

A single operating mechanism is shown for illustrative purposes but itwill be understood that plural mechanisms may be used with a screenconstruction.

The usual bridgetree of a screen apparatus is represented by 2 in whichis journalled a drive or cam shaft 4. The bridgetree may be of anylength and the shaft 4 may be rotated in any well known manner. Saidbridgetree is hollowed out to provide a chamber or well for lubricant,as shown.

A pair of half-housings 6 are provided which are similar inconstruction. These are secured together in back to back relation bybolts such as 8 and fixed to the bridgetree 2 by other bolts Ill. Thehalf-housings are formed to provide a chamber.

Bearing caps 12 of bearings for the shaft 4 are secured to thebridgetree. Parts I 4 of the half-housings are formed to surround theends of the caps 12 and packing means It provides a seal, see Fig. 2.

7 Guides is are secured to the sides of the halfhousings and have parts29 extending through openings in said half-housings which are providedwith guide surfaces 22 forming a vertically disposed guideway, see Fig.4.

A cross-head 24 is reoiprocable up and down in said guideway and thelower portion of the said cross-head is hollowed out to receive a rollershoe 26. Said shoe 26 has trunnions 28 mounted in anti-friction bearings30 associated with opposite sides of the cross-head, see Fig. 2.

A cam 32 fixed to the drive shaft 4 underlies the roller shoe and as thesaid shaft 4 rotates the cross-head is moved upwardly thereby.

A fork member over the cross-head extends upwardly therefrom and it hasits lower end secured thereby by bolts 42. The said lower end of thefork and upper sideof the cross-head are provided with aligned sockets44 and 46 in which a spring 48 is disposed. A spacer 50 at the upper endof said spring 48 is provided and an upper spring 52 is supportedthereby. A cap 54 is pro vided on the upper end of the spring 52.

A cross-bar 56 has opposite ends connected to rods 58 which have lowerends disposed in sockets 62 provided in the half-housings as shown inFig. 1. An adjusting screw 64 in engagement with the cross-bar bears onthe cap 54 and is adapted for adjustment so that the springs 48 and 52may offer varying degrees of resistance to upward movements of thecross-head.

The upper portion of the fork member 40 is secured to the fork member ofthe screen apparatus with which the mechanism is used and as the shaft 4rotates the cross-head is moved upwardly by the cam against the actionof the springs which moves the cross-head downwardly and urges theroller shoe against the cam 32.

Ordinarily the shaft 4 is rotated at high speed to bring about avibrating action of the diaphragm.

The half-housings with the bridgetree provide a closed chamber in whichthe cross-head is disposed and to seal the upper side of the chamber aflexible seal member H! is provided. The inner portion of the seal 10 isclamped between the cross-head and fork member and its outer portion issecured to the upper sides of the half- 3 housings by a clamp member 12and bolts 14, see Fig. 3.

The member 10 may be made from any yieldable or flexible materialdesired such as rubber, leather, composition, treated fabric, or thelike.

Openings 16 and [8 are provided in the halfhousingsfas shown Fig. 1,through which lubricant may be introduced, under pressure, if ""desired,and a receptacle 80 secured to the halfhousings is provided fordirecting lubricant to the surfaces of the guidewayz-andgcrossehead.

The parts of the mechanism may bezxtealdily assembled and disassembledand the construction is such that the operatingjparltsitare-isuitablyenclosed for efiicient lubrication. a H

The invention may be embodied in other specific forms withoutdepartingffromtheviessential characteristics thereof. Hence, the presentembodiments are therefore to be considere'd"in all respects merely asbeing illustrative and not as "being restrictive}- the scopeof'the'invention being indicated by the appended claim rather tlf'ani'by the T-foregoing *descript-ion, and: all *frhodifications and-variatior1s as fallwithin" the'*ir1 eanihg arid purview and-range orequivalency of eapperrded claim' are therefore ifiterided to be embracedtherein. H

What'it isdesiredito claim and secure by lietters"PatentfoftheUnited?Statesiis:

"JIfhe (combination '6f..a" b"'d'getree, provided with bearings having ashaft rotatable therein carrying a cam and having'a well rbetwe'ensaidfbear 'ingsin which. saidfcamjis located and which is ,Qfieriat its;upper "side with '"mecl'ia'riism" for vertically vibrating the'diaphragmLof a; pulp screen comprising, j'half housin'gs extending upwardly fromsaidbridgetreehaving'-contiguous"innerside faces secured "together "insealedtrelation, said haif housihgslormed'tojprovide"averticalochamberbveranuiiin c"o mmiiriicationfwithsaid Welland ,iha'vi'ng "-side w'ails 'fprovided "with openings ftherethroughfi;guide members s'ecu'red to' said =liousings having ypjarts "extendingthrough {8 3 1 -"op'eni r' igs and into i-said 'chamber fand'provided-v'vith'spacedfvertfoally-'extendinginnerfaces disposed in saidchamber, a crosshead in said chamber provided with a spring socket inits upper side, opposite outer side faces of said crosshead and saidinner faces of the guide mem= bers provided with coacting guide means topermit vertical reciprocation of the crosshead in the chamber andprevent relative twisting: movements thereof; airo'ller journalledun thelower portion of said crosshead in engagement with said cam, a flexiblesealing member at the upper side of qfiaid.half honsingiand crossheadhaving an openov-er said spring socket secured thereto and closing theupper end of said chamber, means fs'ecuring s'aid sealing member to saidcrosshead Ei5f rfiJE GafiSacting in the upper side of said crossheaddisposed outside said chamber above .thesse'alingimem ber resistingupward movements ofthe crosshead, and a member over said sealing memb'ersecured to theiupper side of said crosshead adapted for connecting to adiaphragm of a screen -thereabovw each' inner face' of -'-tlie guidemember and' of tl ie'vcrosshead iriluding a pair of longitudinaily-extending fiat=suffacesarrangd in the form of a V, and said verticalchamber and Well aprcviiiing i-a r-compartment for iubricant inwhiclrrsaid cam; roller-arid: crosshead-are (:lis'ps'e'dandr'closedibwsaidtsealing member.

sR-EFEEENCESeGITED V :The followingrferenceswrewfrecord-in the fiieofpatent:

aUNITED ,STA'IES :PA'IENTS

